PontiacBonnevilleClub.com

Stumbled upon this article, thought I'd throw it here. I'm sure some here have seen it, but it's obvious that the average member hasn't.

http://www.superchargersonline.com/content.asp?ID=98

Very interesting and I agree with this..

Cross drilled is race car stuff. Like you race every weekend and replace the rotors a lot during a season.

Very good info and food for thought. Especially since our cars need all the help they can get with stopping power. Thanks for finding the article 00Beast.

cross drilled rotors tend to crack around the holes .

i say if you want good rotors just get slotted rotors

Did u actually read the article? That's exactly what it said...

Unfortunately I can't 100% agree with this article, just like the one I've posted many times that goes on 10x longer than that on how there is no such real thing as rotor warping, it's just uneven material buildup. That happens in MOST cases, but not all. I have Raybestos Drilled/Slotted rotors and Raybestos Ceramic pads, and after all the setups I've used this is by far the best and hasn't given me a single bit of warp, not to mention I've driven through massive puddles while braking and drove like a complete you know what. Not a single issue around any of the drilling. If done properly (a reputable company) drilling is just fine. I understand the premise behind it but there can be other advantages untold (a place for debris to rest instead of engraving itself into the rotor/pad for instance). The slotting works great as outlined in that article. If you are going with eBay drilled rotors where someone took a standard rotor and used a stupid drill to make a hole...obviously something is going to go wrong there.

no i replyed then read it .lol

ChilinMichael wrote:Unfortunately I can't 100% agree with this article, just like the one I've posted many times that goes on 10x longer than that on how there is no such real thing as rotor warping, it's just uneven material buildup. That happens in MOST cases, but not all. I have Raybestos Drilled/Slotted rotors and Raybestos Ceramic pads, and after all the setups I've used this is by far the best and hasn't given me a single bit of warp, not to mention I've driven through massive puddles while braking and drove like a complete you know what. Not a single issue around any of the drilling. If done properly (a reputable company) drilling is just fine. I understand the premise behind it but there can be other advantages untold (a place for debris to rest instead of engraving itself into the rotor/pad for instance). The slotting works great as outlined in that article. If you are going with eBay drilled rotors where someone took a standard rotor and used a stupid drill to make a hole...obviously something is going to go wrong there.

Then why does uneven buildup occur more on cheap rotors than thicker, costlier, and better material rotors? Why does removing the shield on a 90's GMC make the brakes last a lot longer before making the brake pedal feel like a washboard road?

That's why I said I don't agree with it 100%, as in not all the time. Guess the way I said it came across differently than what I intended.

ChilinMichael wrote:Unfortunately I can't 100% agree with this article, just like the one I've posted many times that goes on 10x longer than that on how there is no such real thing as rotor warping, it's just uneven material buildup. That happens in MOST cases, but not all. I have Raybestos Drilled/Slotted rotors and Raybestos Ceramic pads, and after all the setups I've used this is by far the best and hasn't given me a single bit of warp, not to mention I've driven through massive puddles while braking and drove like a complete you know what. Not a single issue around any of the drilling. If done properly (a reputable company) drilling is just fine. I understand the premise behind it but there can be other advantages untold (a place for debris to rest instead of engraving itself into the rotor/pad for instance). The slotting works great as outlined in that article. If you are going with eBay drilled rotors where someone took a standard rotor and used a stupid drill to make a hole...obviously something is going to go wrong there.

Ive cut a bunch of rotors and YES they DO warp. Standard, high-quality ones too. Guess youve just been lucky.

Yeah I guess run-out does not count...lol

I guess nobody is understanding me at all lol. I am saying I don't fully agree with the article I had read that rotors never warp, meaning, I know they do warp at times. It's just seldom it's true warping and most of the time uneven material buildup. Also, proper bedding reduces the risk of true warp greatly. I bet not even 1% of the population knows proper bedding techniques or does them.

all we are doing is beating a dead *fook* horse... Last post from me on this

Mike, we get it.

I've been telling people this for the last 9 years on this Forum. Some choose to listen, others don't.

To the writer of that article and many others I say, do some test and show results or stop writing like you are a know-it-all because you aren't. I don't see one shred of factual evidence, just opinion. Their "opinion" is as good as mine or anyone else's on this forum.

But... this thread and article isn't about rotor warping/pad material transfer/bedding in? I'm still confused as to why you took it that direction, Mike.

It's the same with cross-drilled. The article Ed posted was written in the same manner. A know-it-all with absolutely zero factual data listed, no mention of testing, what was used in testing, where these ideas came from, etc. Just a brief mention of history, their thoughts, and what you should believe and that is that.

The "cheese-grater" effect I saw happening since I've been through 3 sets of ceramic brake pads in the 72k miles I've driven my Buick. ~65k of those miles were with either drilled/slotted rotors or slotted-only rotors. The pads barely made a dent in the rotors before the first set of rotors over-heated with a loaded car coming down a very big hill and genuinely warped due to the heat.

They do stop far better than the blank rotors with cheapy pads on there when I got the car. It's likely the pads more than anything.